Keep food hot and safe for all buffet, catering, and foodservice occasions with the 7Penn 6 Hour Cooking Fuel 12-Pack with FREE Lid Opener. These 7.4-ounce cans warm chafing dishes for 6 hours with sustained temperature. Lower quality Sterno (gel-type fuel) cans last only 1 to 2 hours with no steady or controlled flame, but each of these …